Since the fall of the Soviet Union, a much clearer picture of the Red Army in WW 2 has emerged. See for example, the books written by David M. Glantz. These use documents from Russian archives that were previously inaccessible. These paint a solid picture that the Red Army was, as the title of Glantz's books suggests, a "stumbling colossus." As an indicator of things post WW 2, no nation using Soviet tanks, training, and tactics, has beaten an army using Western armor, training, and tactics to date. In Ukraine we're seeing the same thing, and unless the Ukrainians suddenly stop using what amounts to Russian training and tactics with Western armor they're being given, this pattern will continue to hold true.